The founding of Rome can be investigated through archaeology, but traditional stories handed down by the ancient Romans themselves explain the earliest history of their city in terms of legend and myth. The most familiar of these myths, and perhaps the most famous of all Roman myths, is the story of Romulus and Remus, the twins who were suckled by a she-wolf. This story had to be reconciled with a dual tradition, set earlier in time, that had the Trojan refugee Aeneas escape to Italy and found the line of Romans through his son Iulus, the namesake of the Julio-Claudian dynasty.

The national epic of Rome, the Aeneid of Vergil, tells the story of how the Trojan prince Aeneas came to Italy. The Aeneid was written under Augustus, who claimed ancestry through Julius Caesar from the hero and his mother Venus. According to the Aeneid, the survivors from the fallen city of Troy banded together under Aeneas, underwent a series of adventures around the Mediterranean Sea, including a stop at newly founded Carthage under the rule of Queen Dido, and eventually reached the Italian coast. The Trojans were thought to have landed in an area between modern Anzio and Fiumicino, southwest of Rome: probably at Laurentum, or in other versions, at Lavinium, a place named for Lavinia, the daughter of King Latinus, whom Aeneas married. Through a series of armed conflicts, the Trojans won the right to stay and to assimilate with the local peoples. The young son of Aeneas, Ascanius, also known as Iulus, went on to found Alba Longa and the line of Alban kings who filled the chronological gap between the Trojan saga and the traditional founding of Rome in the 8th century BC.

Rome (/ˈroʊm/; Italian: Roma pronounced [ˈroːma] ( listen); Latin: Rōma) is a city and special comune ("Roma Capitale") in Italy. Rome is the capital of Italy and the capital of Lazio (Latin: Latium). With 2.8 million residents in 1,285.3 km² (496.3 sq mi), it is also the country's largest and most populated comune and fourth-most populous city in the European Union by population within city limits. Between 3.2 and 3.7 million people live in the Rome metropolitan area. The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.

Rome's history spans two and a half thousand years. It was the capital city of the Roman Kingdom, the Roman Republic and the Roman Empire, which was the dominant power in Western Europe and the lands bordering the Mediterranean for over seven hundred years from the 1st century BC until the 7th century AD and the city is regarded as one of the birthplaces of western civilization. Since the 1st century AD Rome has been the seat of the Papacy and, after the end of Byzantine domination, in the 8th century it became the capital of the Papal States, which lasted until 1870. In 1871 Rome became the capital of the Kingdom of Italy, and in 1946 that of the Italian Republic.

Romulus and Remus are the twin brothers and central characters of Rome's foundation myth. Their mother was Rhea Silvia, daughter to Numitor, king of Alba Longa. Before their conception, Numitor's brother Amulius had seized power, killed Numitor's male heirs and forced Rhea Silvia to become a Vestal Virgin, sworn to chastity. Rhea Silvia conceived the twins by the god Mars, or by the demi-god Hercules; once the twins were born, Amulius had them abandoned to die in the river Tiber. They were saved by a series of miraculous interventions: the river carried them to safety, a she-wolf found and suckled them, and a woodpecker fed them. A shepherd and his wife found and fostered them to manhood, as simple shepherds. The twins, still ignorant of their true origins, were natural leaders. Each acquired many followers. When they discovered the truth of their birth, they killed Amulius and restored Numitor to his throne. Rather than wait to inherit Alba Longa they chose to found a new city.

Romulus wanted to found a city on the Palatine Hill; Remus preferred the Aventine Hill. They agreed to determine the site through augury but when each claimed the results in his own favor, they quarreled and Remus was killed. Romulus founded the new city, named it Rome, after himself, and created its first legions and senate. The new city grew rapidly, swelled by landless refugees; as most were unmarried, Romulus arranged the abduction of women from the neighboring Sabines. The ensuing war ended with the joining of Sabines and Romans as one Roman people. Thanks to divine favour and Romulus' inspired leadership, Rome became a dominant force, but Romulus himself became increasingly autocratic, and disappeared or died in mysterious circumstances. In later forms of the myth, he ascended to heaven, and was identified with Quirinus, the divine personification of the Roman people.